using System.Collections.Generic;
using System.Linq;
using IvfTl.Control.Entity.InitEntitys;
using ivf_tl_Control;
using Xunit;

namespace IvfTl.ControlHost.Tests
{
    public class StartupFaultPolicyTests
    {
        private static HouseFault Fault(int sn, HouseFaultType t = HouseFaultType.CcdSnMissing)
            => new HouseFault { HouseSn = sn, Type = t, Reason = "x", Stage = "扫口握手" };

        [Fact]
        public void BadHouseSns_Only_Counts_Known_Houses()
        {
            var faults = new List<HouseFault>
            {
                Fault(6),
                Fault(-1, HouseFaultType.CameraDuplicateSn), // 舱号未知 → 不算坏舱
                Fault(8),
            };
            var bad = StartupFaultPolicy.BadHouseSns(faults);
            Assert.Equal(new[] { 6, 8 }, bad.OrderBy(x => x).ToArray());
        }

        [Fact]
        public void RunnableHouses_Excludes_Bad_And_Sorts()
        {
            var discovered = new[] { 2, 4, 6, 7, 8, 9, 11 };
            var faults = new List<HouseFault> { Fault(6), Fault(8) };
            var run = StartupFaultPolicy.RunnableHouses(discovered, faults);
            Assert.Equal(new[] { 2, 4, 7, 9, 11 }, run.ToArray());
        }

        [Fact]
        public void RunnableHouses_With_No_Faults_Returns_All_Discovered()
        {
            var discovered = new[] { 2, 4, 6 };
            var run = StartupFaultPolicy.RunnableHouses(discovered, new List<HouseFault>());
            Assert.Equal(new[] { 2, 4, 6 }, run.ToArray());
        }

        [Fact]
        public void RunnableHouses_UnknownHouseFault_Does_Not_Exclude_Anyone()
        {
            var discovered = new[] { 2, 4 };
            var faults = new List<HouseFault> { Fault(-1, HouseFaultType.CameraReadFailed) };
            var run = StartupFaultPolicy.RunnableHouses(discovered, faults);
            Assert.Equal(new[] { 2, 4 }, run.ToArray());
        }

        [Fact]
        public void IsFatal_True_Only_When_No_Runnable_House()
        {
            Assert.True(StartupFaultPolicy.IsFatal(new List<int>()));
            Assert.False(StartupFaultPolicy.IsFatal(new List<int> { 11 }));
            Assert.False(StartupFaultPolicy.IsFatal(new List<int> { 2, 4 }));
        }

        [Fact]
        public void Partial_Failure_Is_Never_Fatal()
        {
            // 7 个舱里坏 2 个 → 仍 5 个可跑 → 不致命(核心需求)
            var discovered = new[] { 2, 4, 6, 7, 8, 9, 11 };
            var faults = new List<HouseFault> { Fault(6), Fault(8) };
            var run = StartupFaultPolicy.RunnableHouses(discovered, faults);
            Assert.False(StartupFaultPolicy.IsFatal(run));
        }
    }
}